Enamel Pigments Copper Chromite Black Spinel PBk 28

Pigment Black 28 (PBk 28, C.I. 77428), chemically known as Copper Chromite Black Spinel (CuCr₂O₄), is a high-performance Complex Inorganic Colored Pigment (CICP) featuring a unique inverse spinel structure. As a cobalt-free black pigment, PBk 28 delivers exceptional heat resistance, weatherability, and chemical stability for the most demanding industrial applications.

Alternative Names: Copper Chrome Black, Copper Chromium Black, Copper Chromate

 

FULLN CHEMICAL Enamel Pigments Copper Chromite Black Spinel PBk 28 FU-E693,P.Bk.28 (77428) is a metal oxide pigment and a product of high temperature calcination. In the calcination process, copper oxide and chromium oxide green diffuse each other to form a substance with spinel crystal structure. The FULLN CHEMICAL Enamel Pigments Black pigment FU-E693 product may contain a small amount of additives like nickel oxide, manganese dioxide and molybdenum trioxide.

 

FU-E693 Copper Chromite Black Spinel PBk 28 is a kind of black powder, which is a metal oxide misphase pigment synthesized by a variety of metal oxides through high temperature solid phase reaction. It has the crystal structure of spinel, which makes the pigment show excellent thermal stability. It has good color performance and hiding power in glass ink, and is suitable for glass fluxes of different system components.

Mass Tone	Item NO.	C.I.	C.I. NO.	Item Name	Composition	CAS NO.	Technical Indication			Product Description
							Heat Stability	Moisture %	325 Mesh Sieve Residue
	FU-E693	P.Bk.28	77428	Copper Chromite Black Spinel	Cu-Cr	68186-91-4	900℃	≤0.3	≤0.10	Suitable for high gloss glaze and matte glaze

 

FULLN CHEMICAL Enamel Pigments Black pigment Copper Chromite Black Spinel PBk 28 FU-E693 is specially developed for enamel products. We choose environmental protection. With the strict control the process flow, we make strict detextion of the black enamel pigments on the fineness, moisture, coloring, dispersion and other parameters. So that each batch of products have excellent coloring performance and chemical stability. FULLN enamel color pigments are with 400 mesh sieve fineness ≤ 0.3%, moisture ≤ 0.5%. FULLN enamel pigment products have a variety of colors, such as black, red, yellow, blue, purple and green. FULLN technical engineers can also work out the enamel pigment colors needed by customers according to their requirements.

 

[Applications]

1. High-Performance Coatings

Fluorocarbon coatings, coil coatings, powder coatings, industrial coatings

Automotive coatings (OEM and refinish)

Architectural coatings and exterior coatings requiring outdoor durability

UV coatings and stoving coatings (bake systems)

Silicone heat-resistant coatings for high-temperature equipment

Non-stick coatings for cookware and industrial applications

2. Plastics & Polymers

Color masterbatch for PE, PP, ABS, PC, and other engineering plastics

PVC profiles, pipes, and films

Food contact plastics (compliant with FDA/EU regulations)

Automotive interior plastics

Plastic film, fiber, and profile applications

Applications requiring no warping and dimensional stability

3. Ceramics, Glass & Enamel

Ceramic glazes and ceramic stains for architectural and technical ceramics

Enamel / porcelain enamel coatings

Glass coloring and glass tinting

Glass ink / glass printing ink for automotive tempered glass

Ceramic ink for digital decoration

4. Building Materials & Specialty Applications

Cement and concrete coloring

Colored sand for decorative finishes

Printing inks for high-durability applications

Silicones and rubber compounding

Art coatings and artistic pigments

Rock fresco coatings

 

 

NIR Absorbing / Infrared Absorption: Excellent thermal absorption properties for specialized coatings

✅ Easy to Disperse: Superior dispersion in solvent-based and water-based systems

✅ Non-Migratory / Non-Bleeding: No migration in PVC, polyolefins, and engineering plastics

✅ No Warping / No Shrinkage: Ideal for precision plastic molding applications

✅ High Tinting Strength: Deep jet black shade with excellent coverage

✅ UV Resistance: Superior protection against ultraviolet degradation

 

 

Why Choose Our PBk 28?

"As a professional pigment and chemical export supplier, we serve global markets across Europe, America and Asia with consistently high-quality Pigment Black 28 products. Our copper chromite black spinel offers a cobalt-free, high-performance solution for applications where carbon black fails due to heat limitations. Whether you need deep black shades for automotive coatings, non-migratory performance for food contact plastics, or long-term heat resistance for silicone coatings, our PBk 28 delivers reliable, eco-friendly results."

 

 

 

 

Something about Enamel Products

Enamel Products

It is a kind of composite material that solidifies the inorganic vitreous material on the base metal through melting and firmly combines with the metal.

 

 

Q: To what standards can the dimensions be accurate? How to ensure that the products produced meet the customer's requirements for accuracy.

A: According to the different application range of customers, the fineness of our products also has different requirements. Generally, the fineness of our color material is 325 mesh sieve. Roller color and ink color and nano pigment requirements will be higher. In addition to the fineness requirements, we also have corresponding requirements on the electrical conductivity and oil absorption of the pigment products.

 

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